Switch apps with the Home button

If you have an iPhone 8 or earlier, or an iPad:

Double-click the Home button to see recently used apps.

Swipe left or right to find the app that you want to use.

Tap the app.

Use Background App Refresh

After you switch to a different app, some apps run for a short period of time before they're set to a suspended state. Apps that are in a suspended state aren’t actively in use, open, or taking up system resources. With Background App Refresh, suspended apps can check for updates and new content.

If you want suspended apps to check for new content, go to Settings > General > Background App Refresh and turn on Background App Refresh. If you quit an app from the app switcher, it might not be able to run or check for new content before you open it again.